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Honeywell VISIONPRO 68-0287-04 User Manual: Checkout/calibration; Sensor Resistance At Room Temperature; Communication Error Codes

Iaq total home comfort system.
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installed with Thermostat Installer Setup Number 340 set to 2,
the temperature displayed on the thermostat home screen as
Inside Temperature will be a 50/50 average between the
temperature sensed at the remote sensor location and the
temperature sensed at the thermostat location.
The C7189U1005 Wall Mount Temperature Sensor converts
room temperature to a resistance that the thermostat can
interpret.
The C7189U1005 has a negative temperature coefficient
(NTC), which means that resistance decreases as the
temperature increases. See Table 13.
The C7189U1005 can be used to provide one remote sensor
input (see Fig. 26) or as a temperature averaging network with
multiple C7189U1005 Sensors connected, as shown in Fig. 27.
Checkout
For best results, allow C7189U1005 Wall Mount Temperature
Sensor to absorb the air moving through the room for a
minimum of twenty minutes before taking a resistance
measurement.
With an accurate thermometer (±1°F [0.5°C]) measure the
temperature at the sensor location, allowing time for the
thermometer to stabilize before reading.
To verify sensor resistance, remove one wire from one of
C7189U1005 wiring terminals. Use an ohmmeter to measure
the resistance across the sensor. Then verify the sensor
accuracy with the temperature/resistance in Table 13.
Calibration
The C7189U1005 Wall Mount Temperature Sensor is
calibrated at the factory and cannot be recalibrated in the field.
Table 13. Sensor Resistance at Room Temperature.
Room
Temperature
Ohms of
°F
°C
Resistance
40
4.4
22537
42
5.6
21516
44
6.7
20546
46
7.8
19626
48
8.9
18754
50
10.0
17926
52
11.1
17136
54
12.2
16387
56
13.3
15675
58
14.4
14999
60
15.6
14356
62
16.7
13743
Room
Temperature
Ohms of
°F
°C
Resistance
72
22.2
11100
74
23.3
10644
76
24.4
10210
78
25.6
9795
80
26.7
9398
82
27.8
9020
84
28.9
8659
86
30.0
8315
88
31.1
7986
90
32.2
7672
92
33.3
7372
94
34.4
7086
35
®
VISIONPRO
IAQ TOTAL HOME COMFORT SYSTEM
Table 13. Sensor Resistance at Room Temperature.
Room
Temperature
Ohms of
°F
°C
Resistance
64
17.8
13161
66
18.9
12607
68
20.0
12081
70
21.1
11578
COMMUNICATION ERROR CODES
®
VisionPRO
IAQ can alert the homeowner and installer to
problems with the HVAC equipment, thermostat, or equipment
interface module by using error codes. Please see Table 14 for
a list of error codes. When an error is active (the condition
causing the error is still present) it will be displayed in the time
field on the thermostat home screen. The home screen can
display up to 5 active errors. The time field will flash the time,
"Err," and a list of up to 5 error codes, beginning with the most
critical, and repeat until the errors have been remedied.
A log of error codes can be viewed at the end of the installer
setup after the system tests. Active errors will be shown first.
The Error Log will log the last ten errors (active and inactive).
Pressing the reset button will clear all inactive errors from the
error log; active errors can not be cleared until the condition
has been remedied.
Table 14. VisionPRO
Error Code
027
Faulty thermostat (must be replaced)
035
Duplicate thermostat zone detected
036
Duplicate UV timer
037
Duplicate filter timer
038
Duplicate humidifier pad timer
039
Duplicate indoor humidity sensor
040
Compressor should be running but it is not
050
Duplicate outdoor temperature sensor
052
Faulty post-coil air discharge sensor
053
Faulty outdoor temperature sensor
054
Faulty indoor humidity sensor
089
Heating/cooling equipment is missing
090
Data interface is continuously busy
091
Thermostat is not receiving data from other
equipment
118
Faulty discharge air temperature sensor
119
Faulty temperature sensor
121
Duplicate post-coil air discharge sensor
Room
Temperature
Ohms of
°F
°C
Resistance
96
35.6
6813
98
36.7
6551
100
37.8
6301
®
IAQ Error Codes.
Meaning
68-0287—04

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